Items from the non-breakpoint list ALWAYS have a chance of dropping. This doesn't necessarily mean that they will drop, but they can.
Items from the breakpoint list only have a chance of dropping when a boss has been 'broken'.

In limited dungeons you will either get one or two drops from bosses. One drop is always from the non-breakpoint list, the other is from the breakpoint list. Fear cores in limited dungeons seem to be pretty rare though, I've never seen one drop there yet. They drop a lot more frequently in trial dungeons.

Items from the non-breakpoint list ALWAYS have a chance of dropping. This doesn't necessarily mean that they will drop, but they can.
Items from the breakpoint list only have a chance of dropping when a boss has been 'broken'.

In limited dungeons you will either get one or two drops from bosses. One drop is always from the non-breakpoint list, the other is from the breakpoint list. Fear cores in limited dungeons seem to be pretty rare though, I've never seen one drop there yet. They drop a lot more frequently in trial dungeons.

I wonder if that's a similar case for killing bosses outside of dungeons. I notice their breakpoint lists are the same lists as their normal drops, minus thoughts, so I never really bothered trying to hit their weakpoint. But for double drops, might be worth it for a little extra cash.

I wonder if that's a similar case for killing bosses outside of dungeons. I notice their breakpoint lists are the same lists as their normal drops, minus thoughts, so I never really bothered trying to hit their weakpoint. But for double drops, might be worth it for a little extra cash.

Yeah it works the same for those mobs outside, works that way for all the bosses with break points kinda.